Geology and Landslide Risk Assessment

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Questions and Answers

Which geological factors are considered significant in predicting rainfall-induced landslides?

Soil type and vegetation cover

Slope and soil type (correct)

Elevation and temperature

Slope and seismic activity

What role does rainfall play in the occurrence of landslides?

Weakens slope materials and rocks (correct)

Stimulates tectonic activity

Acts as a lubricant for earth movement

Increases the weight of slope materials

Which of the following conditions can lead to the inevitability of landslides on steep slopes?

Heavy rainfall combined with vegetation growth

Weakening of slope materials with additional load (correct)

Regular seismic activity without additional rainfall

Sunny weather conditions improving slope stability

What is a failure in the context of landslides?

A sudden collapse of the slope structure. Signup and view all the answers

Which method is mentioned as being particularly useful in evaluating areas prone to landslides?

Satellite mapping Signup and view all the answers

Which mode of failure is characterized by the downward movement of a slope without any rotation?

Sliding Signup and view all the answers

What is a crucial element for effective landslide management in vulnerable communities?

Awareness of hazard maps Signup and view all the answers

During a rainfall-induced landslide, which action is advisable according to safety guidelines?

Constantly monitor debris movement Signup and view all the answers

What factor does NOT contribute to the mode of failure of a landslide?

Television signals Signup and view all the answers

Which of the following strategies is NOT recommended for mitigating landslide risks?

Building near drainage paths Signup and view all the answers

What should be checked for after a landslide event?

Presence of trapped individuals Signup and view all the answers

What is the primary cause of the majority of sinkholes?

Dissolution of surface rock Signup and view all the answers

How does suffusion lead to the formation of sinkholes?

By covering cavities with sediments that erode over time Signup and view all the answers

Which factor does NOT contribute to the exposure of the mantle that can lead to sinkholes?

Building construction Signup and view all the answers

What is the relationship between carbon dioxide and the formation of sinkholes?

It contributes to the creation of carbonic acid, affecting dissolution. Signup and view all the answers

What is the primary reason for the formation of carbonic acid in groundwater?

Exposure to atmospheric carbon dioxide Signup and view all the answers

What is the temperature requirement for a typhoon to form?

More than 27°C Signup and view all the answers

Which theory explains the initial instability of air leading to typhoon formation?

The Convective Theory Signup and view all the answers

What key action should be avoided near a sinkhole?

Dropping objects into the sinkhole Signup and view all the answers

What factor contributes to the development of storms after an upward lift of warm air in typhoon formation?

Low pressure area creation Signup and view all the answers

Study Notes

Extreme Weather: Cold and Heat

Heat Wave: A period of excessively hot weather, leading to potential health problems.
Definition: Daily maximum temperature exceeds the average by 5°C (9°F) for a prolonged period.
Negative effects: Skin cancer, heat stroke, dehydration, sunburn.
Heat Cramps: Muscle pain and cramps due to excessive exertion in hot conditions.
Heat Exhaustion: Occurs when excessive sweating leads to dehydration in hot, humid conditions.
Heat Stroke: A life-threatening condition where the body's temperature control system fails, leading to a dangerously high body temperature (can result in death).

Extreme Weather: Cold

Cold Wave: A rapid drop in temperature within a short period.
Criteria: A sharp drop of 3-4°C or more below normal temperatures in regions where normal temperatures are above 40°C, or a drop of 7°C or more if normal temperatures are below 40°C, over 24 hours.
Impact: Freezing of pipes and water mains, increased demand for heating, rise in fires.

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Description

This quiz explores the significant geological factors involved in predicting rainfall-induced landslides and the role of rainfall in their occurrence. It also covers modes of failure, management strategies, and safety guidelines for vulnerable communities. Test your understanding of landslides and sinkholes through various thought-provoking questions.